Drilling Engineering

  1. Drilling Problems and Mitigation
    1. Lost Circulation
      1. Causes and Types
        1. Natural Fractures
          1. Induced Fractures
            1. Cavernous Formations
              1. Unconsolidated Formations
              2. Detection Methods
                1. Pit Level Monitoring
                  1. Flow Rate Changes
                    1. Pump Pressure Changes
                    2. Lost Circulation Materials
                      1. Fibrous Materials
                        1. Shredded Paper
                          1. Wood Fibers
                            1. Mineral Fibers
                            2. Flaky Materials
                              1. Mica
                                1. Cellophane
                                2. Granular Materials
                                  1. Nut Hulls
                                    1. Calcium Carbonate
                                    2. Chemical Sealants
                                      1. Bentonite-Diesel
                                        1. Cement Plugs
                                      2. Remedial Techniques
                                        1. LCM Pills
                                          1. Cement Plugs
                                            1. Expandable Packers
                                          2. Wellbore Instability
                                            1. Shale Instability
                                              1. Hydration Swelling
                                                1. Osmotic Effects
                                                  1. Time-Dependent Failure
                                                  2. Borehole Collapse
                                                    1. Mechanical Failure
                                                      1. Stress Concentration
                                                        1. Weak Formations
                                                        2. Prevention Strategies
                                                          1. Mud Weight Optimization
                                                            1. Chemical Inhibition
                                                              1. Mechanical Support
                                                              2. Mitigation Techniques
                                                                1. Casing Installation
                                                                  1. Hole Conditioning
                                                                    1. Mud System Changes
                                                                  2. Stuck Pipe
                                                                    1. Differential Sticking
                                                                      1. Pressure Differential
                                                                        1. Filter Cake Contact
                                                                          1. Prevention Methods
                                                                          2. Mechanical Sticking
                                                                            1. Key Seating
                                                                              1. Undergauge Hole
                                                                                1. Cuttings Accumulation
                                                                                2. Freeing Techniques
                                                                                  1. Jarring Operations
                                                                                    1. Spotting Fluids
                                                                                      1. Back-off Operations
                                                                                        1. Washover Operations
                                                                                        2. Prevention Methods
                                                                                          1. Proper Hole Cleaning
                                                                                            1. Pipe Movement
                                                                                              1. Mud Properties Control
                                                                                            2. Hole Cleaning Issues
                                                                                              1. Cuttings Accumulation
                                                                                                1. Inadequate Flow Rate
                                                                                                  1. Poor Rheology
                                                                                                    1. Deviated Holes
                                                                                                    2. Indicators
                                                                                                      1. High Torque
                                                                                                        1. High Drag
                                                                                                          1. Overpull
                                                                                                            1. Fill on Connections
                                                                                                            2. Remedial Actions
                                                                                                              1. Circulation Sweeps
                                                                                                                1. Wiper Trips
                                                                                                                  1. Rheology Adjustment
                                                                                                                    1. Flow Rate Increase
                                                                                                                  2. Equipment Failure
                                                                                                                    1. Drill String Failures
                                                                                                                      1. Fatigue Failures
                                                                                                                        1. Washout Failures
                                                                                                                          1. Connection Failures
                                                                                                                          2. BHA Component Failures
                                                                                                                            1. Bit Failures
                                                                                                                              1. Motor Failures
                                                                                                                                1. MWD Tool Failures
                                                                                                                                2. Surface Equipment Failures
                                                                                                                                  1. Pump Failures
                                                                                                                                    1. Rotary Table Failures
                                                                                                                                      1. BOP Failures
                                                                                                                                      2. Preventive Maintenance
                                                                                                                                        1. Inspection Programs
                                                                                                                                          1. Replacement Schedules
                                                                                                                                            1. Performance Monitoring
                                                                                                                                          2. Formation Fluid Hazards
                                                                                                                                            1. Hydrogen Sulfide
                                                                                                                                              1. Detection Methods
                                                                                                                                                1. Safety Procedures
                                                                                                                                                  1. Emergency Response
                                                                                                                                                  2. Carbon Dioxide
                                                                                                                                                    1. Corrosion Effects
                                                                                                                                                      1. Safety Considerations
                                                                                                                                                      2. Formation Water
                                                                                                                                                        1. Salinity Effects
                                                                                                                                                          1. Corrosion Potential

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                                                                                                                                                      13. Directional and Horizontal Drilling

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                                                                                                                                                      15. Well Completion and Handover